The Joby Aviation eVTOL is described as a helicopter-airplane hybrid, with fixed wings and six propellers mounted on nacelles and capable of tilting 90 degrees. It will take off and land vertically, ...

MT-Propeller has flight tested an 11-bladed propeller on a Piper PA-31T Cheyenne twin turboprop. MT-Propeller said this 11-bladed prop produced a 15 percent increase in static thrust over a standard, ...

It's fairly common knowledge that when a supersonic aircraft approaches the sound barrier, what follows is the sonic boom. This transitory period between subsonic and supersonic, known as transonic ...

This paper by TSAW Drones discusses the need for less noise in UAVs, how these toroidals can benefit the drone industry, how these propellers came to be and how exactly they reduce the noise. Also, in ...